Heel attaching machines



July 5, 1960 F. w. SPENCER 2,943,329

HEEL ATTACHING MACHINES Filed May 26, 1958 9 Sheets-Sheet 1 I *56 86 E Inventor Fan/i W Spencer L 5y fzllsAtzomey y 1960 F. w. SPENCER 2,943,329

HEEL ATTACHING MACHINES Filed May 26, 1958 9 Sheets-Sheet 2 July 5, 1960 Filed May 26, 1958 F. W. SPENCER HEEL ATTACHING MACHINES 9 Sheets-Sheet 3 I i1 1 Q1 k I 1 i I I l 1% I J I J 1 a H. 51 m 3),)

July 5, 1960 F. w. SPENCER 2,943,329

HEEL ATTACHING MACHINES Filed May 26, 1958 9' Sheets-Sheet 4 i m l July 5, 1960 F. w. SPENCER 2,943,329

HEEL ATTACHING MACHINES Filed May 26, 1958 9 Sheets-Sheet 5 9 Sheets-Sheet 7 Filed May 26, 1958 July 5, 1960 F. w. SPENCER HEEL. ATTACHING MACHINES 9 Sheets-Sheet 8 Filed May 26, 1958 United. States Patent HEEL ATTACHING MACHINES Frank W. Spencer, Beverly, Mass, assignor to United Sh e Machinery Corporation, F ming ou, NJv orporation of New Jersey Filed May .26, 19 58, Ser, N- 737,842

Claims. (C1- 1-141) This invention relates to heel attaching machines of the general type disclosed in application Serial No. 680,511, filed. August 27, 1957, now Patent No. 2,904,788, granted Sept. 22, 1959, in the names of Ferman N. Lee et al 1t being an object of the invention to provide a heel attaching machine by the use. of which an unskilled operator may quickly and. effectively attach heels to shoes.

The illustrative machine is described with reference to the attachment of rubber heels to shoes, which are mounted on geometrically graded lasts such as disclosed in United States Letters Patent No. 2,806,233, granted September 17, 1957, on an application filed in the names of Arthur R. Hubbard et al., by the use of nails, which are driven into the heel and the heel seat of the shoe and are clenched against the heel plate of the last, by drivers reciprocable in passages of a nailing die arranged at a heel attaching station of the machine. I

The last, bearing the shoe is placed on a spindle of a jack at a loading and unloading station spaced from the heel attaching station, said jack in accordance with a feature of the present invention being provided with mechanism movable in response to the placing of the last on the jack for orienting the last on and securing it to the jack. The illustrative jack is moved horizontally by fluid pressure means hereinafter described between the loading and unloading station and the heel attaching station to transfer the shoe between these stations and is moved vertically at the heel attaching station as is the jack of the machine disclosed in said application Serial No. 680,511 whereby to force the heel seat of the shoe against a heel in a heel form, which is then arranged over the nailing die, and to move the shoe and its attached heel vertically away from the heel form preparatory to moving it horizontally back to its loading and unloading station. Movement of the jack through its cycle of operation, in accordance with a further feature of the invention, is initiated in response to placing of the last,

upon which the shoe is mounted, upon the jack.

.In order to insure that the work shall be. promptly removed from the jack as it arrives at the loading and unloading station of the machine the illustrative jack, in accordance with a further feature of the invention, has associated with it an ejector which forces the last with the shoe mounted on it from the spindle of the jack and onto a tray.

The illustrative machine comprises fluid pressure means substantially identical with corresponding means disclosed in application Serial No. 680,511 forforcing, at the heel attaching station, the shoe on the jack against the heel in the form arranged over the nailing die and for moving the shoe 'with the heel attached to it away from the nailing die, and fluid pressure means comprising drivers for driving nails resting in passages of the nailing die into the heel and the heel seat of the shoe, the above fluid pressure means being correlated for operation in timed relation 'with the fluid pressure means which moves the jack between the loading and unloading station and the heel attaching station.

ice

With. a view t impro ilv l a ing m c a sm of the machine disclosed n appli t n S rial N 68 the. i en machine co pr se a loader bl k a ua by flu d pressur me n operative. in. timed rel io i h bove-m ntioned flu p ss re. means whi h s ates the jack and the, nail driving mechanism. In the l tr tiv ma h ne th h e fo m is p a i ely es ed tothe l de bl k and is. in a heelfrece v s p on hen the l der lo is in a nail. dump g p sition e t e n ing. ie. sa he l. o m b ng n an active or pressure receiving position over said nailing die when the loader block is beneath a foot plate which receives from tubes, nails from a nail distributor. The loader block automatically supplies nails to the nailing die as he jac mo om. h hee a achin tati e loading and unloading station and remains at rest over i ng e until the b innin the fo lo in cy le, the loader block being automatically returned to it s nail receiving position beneath the foot plate as the jack starts from its. loading and unloading station toward the heel attaching station at the beginning of the next cycle.

The present invention consists in the foregoing features and in novel features hereinafter described, reference being had to the accompanying drawings which illustrate one embodiment of the invention selected for purposes of illustration, said invention being fully disclosed in the following description and claims.

In e d a ng Fig. 1 is a front view, partly broken away and partl in section, of the illustrative machine; 7

Fig. 2 shows in side elevation portions of an operating head of the machine to a jack of which a shoe has been secured in a predetermined position, said jack having moved a slightdistance rearward from a loading and unloading t tio Fig. 3 shows the operating head of the machine. in its rest position, a, shoe having been presented tothe jack preparatory to starting the machine through a cycle;

Fig. 4 is a perspective view of a portion of the machine illustrated in'Fig. 3 after a heel has been attached to the shoe on the jack and said shoe, including the heel, is at a heel attaching or operating station preparatory to being returned to the loading and unloading station;

Fig. 5 is an exploded view showing in perspective, partly in section, the construction of the jack and a mounting therefor;

Fig. 6 is a perspective view of nail transfer or loader mechanism of the machine;

Fig. 7 is a detail view of mechanism shown in Fig. 6 for facilitating the operation of a nail distributor used with the illustrative machine;

Fig. 8 is a plan view showing heel supporting and nail transfer mechanism of the machine when the machine is at rest;

Fig. 9 is a plan view corresponding to Fig. 8 but showing portions of the heel supporting and nail transfer mechanism during the heel attaching cycle of the machine;

Fig. 10 is a view on the line X-X of Fig. 2;

Fig. 11 is a perspective view partly in section, of the rear end of a shoe which has had a heel attached to it by the use of the illustrative machine; and

Figs. 12 and 13 are hydraulic and wiring diagrams respectively for use in describing the construction and operation of the machine.

The illustrative machine is described with reference to the attachment of a composite heel 28, which comprises a rubber lift 30 (Fig. 11) and a base lift 32 cemented or spotted to the rubber lift, to a heel seat 34 of a shoe 36 and comprises a carriage or slide 38 having secured to it a heel form 40 which is provided with a cavity 42 of suitable shape to receive the rubber lift, and a carrier 3 or jack 700. The jack 700, which may also be referred to as a support, is movable between a loading and unloading position or station 46 (Figs. 2, 3, 5 and 12) where a geometrically graded last 50, which bears the shoe 36 or upon which the shoe is mounted, is presented to the jack and a heel attaching or operating position or station 52 where the heel seat 34 of the shoe is forced against the heel 28 in the form 40, first under preliminary pressure and then under secondary or augmented pressure by hereinafter described mechanism operatively connected to fluid pressure means 54 (Fig. 12).

When the heel seat 34 of the shoe 36 has been forced against the heel 28 in the form 40 with preliminary pressure, a driver head 56 (Fig. 12) is raised by fluid pressure means 58, which is open to and operated in timed sequence with the fluid pressure means 54, causing drivers 60 secured to said head to drive nails or fastenings 62 (Fig. 11), which are then in passages 64 (Figs. 4 and 9) of the nailing die 66, into the heel 28 and the heel seat 34 of the shoe to their clenched positions shown in Fig. 11 whereby to attach the heel to the shoe. As the nails 62 being driven into the work meet resistance, pressure of the fluid in the fluid pressure means 54, 53 builds up and causes the heel seat 34 of the shoe 36 to be forced downward against the heel 28 in the form 40 with secondary pressure which is additional to said preliminary pressure and, as will be hereinafter explained, is substantially equal to the upward pressure exerted by the driver head 56 in forcing the nails 62 into the work.

After the nails 62 have been driven predetermined distances into the heel 28 and the heel seat 34 of the shoe 36 the drivers 60 are automatically lowered, by mechanism hereinafter described, to their retracted positions shown in Fig. 12 and simultaneously therewith the jack 700 and accordingly the last 50 and the shoe 36, to which the heel has been attached, are raised vertically as a unit at the heel attaching station 52 and are thereafter moved forwardly in a horizontal rectilinear path to the loading and unloading station 46. As the jack 700 reaches the loading and unloading station 46 the last 50 is released from the jack and an ejector 702, as will be hereinafter explained, is actuated by fluid pressure means 704 (Figs. 2, 5 and 12) operated in timed relation with the above-mentioned fluid pressure means 54, 58 of the machine to insure that the work shall be forced from the jack 700 causing it to fall into a cloth cradle 706 (Figs. 1 and 3) preparatory to being placed on a shoe rack (not shown).

As above explained, in most respects the illustrative machine is identical with the machine illustrated in application Serial No. 680,511. In order that the reader may compare these machines and if desirable obtain a more detailed description of the construction and operation of the present machine by referring over to said application Serial No. 680,511, applicant has assigned the same reference numerals to corresponding parts of the machine described in application Serial No. 680,511 and the machine disclosed in the present application. Mechanism which forms part of the machine of the present application and has been added to the heel attaching machine disclosed in application Serial No. 680,511 has assigned to it reference numerals of 700 and above.

Power for operating the various fluid pressure means of the illustrative machine is provided by a motor 376 (Figs. 12 and 13) operated by current supplied through lines 378 wired to a primary coil 380 of a transformer T. Wired to one end of a secondary coil 382 of the transformer T is a trunk line 140 and wired to an opposite end of a secondary coil is a trunk line 140a, said trunk lines having bridging them a plurality of automatically controlled circuits hereinafter referred to.

In order to power the machine the operator depresses a plunger 384 of a starting switch 386 across terminals of this switch causing a coil K of a relay to be energized and accordingly closing normally open switches KA and KB of this relay. The closing of the switch K-A causes the motor 376 to start thereby powering the fluid pressure means of the machine. The closing of the switch K-B establishes a holding line 388 so that the plunger 384 of the normally open switch 386 may be released by the operator, after it has been depressed, without deenergizing the relay coil K. The closing of the switch K-B also establishes, through a pair of normally closed safety switches M-13, M-14, the trunk line 140. The closing of the switch K-B also causes pilot lights (not shown) of the machine to be lighted. Overload relays OR are also provided. Power for operating the machine may be turned off by opening a normally closed switch 387.

The nails 62 are delivered to the passages 64 of the nailing die 66 by a loader block 68 which has nail passages 70 (Figs. 3, 6, and 8) and is automatically swung, by mechanism hereinafter described, between a nail receiving position beneath a foot plate 72 (Figs. 4, 8 and 9), which forms part of a replaceable beer mug" or tube holder 74 and has passages '73, and a nail discharge or dumping position over the nailing die. The nails 62 are delivered to the passages 73 and to the loader block 68 in its rest or waiting position beneath said passages through upper and lower tubes 76, 78 (Fig. 3) which are of a predetermined pattern or design in accordance with the selected tube holder 74. Nails are delivered to the tubes 76 from a nail distributor 80 (Fig. 6) generally similar to the nail distributor disclosed in United States Letters Patent No. 1,381,240, granted June 14, 1921, on an application filed in the name of Joseph L. Pope, improved as disclosed in United States Letters Patent No. 2,319,797, granted May 25, 1943, on an application filed in the name of Wallace M. Cutler.

The illustrative machine which, as above explained, is similar in many respects to the machine described in application Serial No. 680,511 comprises a main frame 84 which supports the various operating parts of the machine. Threaded into and secured to the main frame 84 is a pair of rods 86 upon shoulders 88 (Figs. 1 and 2) of which rests a bracket 90 secured by nuts 92 to the rods. The bracket 99 has formed in it a cavity 94 for receiving the nailing die 66 which is held in its operating position in the bracket by a latch plate 96. Arranged beneath the bracket 90 and having sleeve portions which are mounted slidingly upon the rods 86, is a cross head 98 (Figs. 1 and 2) to which the driver head 56 (Fig. 12) is interchangeably secured. The lower ends of the rods 86 are provided with shoulders 104 (Fig. 1) adapted to be engaged by the sleeve portions of the cross head 98 to limit downward movement of the cross head, a depending shank of which is slidable in a vertical guideway 108 (Figs. 1 and 12) of the main frame 84 and is coupled by a pin 110 to the upper end of a piston or actuator 112 movable along a bore 114 of a cylinder 116 which is secured to said frame by a plurality of screws 118 (only one shown).

Secured to the bracket 90 is a transversely extending rod 142 which passes through a bore (not shown) of the carriage 38 and serves transversely to guide said carriage, as will be explained later, over alined flat upper faces of the bracket and the nailing die 66. When the heel form 40 secured to the carriage 38 is in its nailing position shown in Fig. 4 its lower face substantially engages the flat upper face of the nailing die 66. The carriage 38 is moved to the left to its idle or heel receiving position shown in Fig. 3, and is tilted slightly upward about the rod 142 by reason of the engagement of the cam face 146 of the slide with a roll 148 mounted on the bracket 90. The heel form 40 is initially positioned on and secured to the carriage 38 by the use of a spring-pressed pin 150 which fits slidingly in the bore of the carriage and may be manually retracted and allowed to move by spring action into an alined bore of said form positioned on the carriage.

holder 74 in response to the closing of 'anormally open switch M-ll eifected by the placing of the last 50' having the shoe 36 mounted on it upon the jack 700. The closing of the switch. M-11. causes a normally open. switch K3-A (Fig. 13 of a relay embodying a coil K3 to be closed: with the result that solenoids S6,. S7 and S3 are energized. through a normally closed switch KZ-A of a relay including a coil K2. The energizing. ofv the solenoidl S6 causes an. olfset bell crank lever 166 (Fig. 6) operativelyconnected to the solenoid to be swung clockwise against the action of. a spring 165 and the sliding to the left of an arm 167 which is pivotally connected to the bell crank lever and is supported at its outer end by abearing pin 708 (Figs. 6 and 7) passing through a slot 7'10 in the arm and threaded into a fixed, frame portion of the nail distributor 80. The energizing of the coil K3 also eifects the closing of a normally open switch K3-B. As will be hereinafter explained, the energizing of the solenoid S7 causes the heel form 40 and the loader block. 68 to be moved from their positions shown in Fig. 8 to their positions shown in Fig. 9 and the energizing of the solenoid S3 causes the jack 700 to be moved from the: loading and unloading station 46 and to be held inv the heel attaching station 52.

Secured to a pivot pin 712 (Fig. 7) journaled on a fixed frame portion of the nail distributor 8,0 is a latch 714 normally held against a stop pin 716, which is fixed to said. frame portion, by a spring 718. Pivotally mounted on a pin 720 carried by the arm 167 is a block 722 normally held against a stop pin 724, which is secured to the arm, by a spring 726. When the machine is at rest. the block 722 is in its position shown in Figs. 6 and 7, a face 722a of the block being arranged to the right of a stud 728 secured to the latch 714. When the solenoid S6 isenergized the arm 167 operating through the block 722 withdraws the latch 714 from a face 730 of the clutch 158, the block thereafter pivoting on the arm to a position inwhich it releases the latch and allows it to be moved by the spring 718 back to its clutch disengaging position ready to cause the rotation of the clutch to cease after it has completed one revolution. As will be hereinafter explained, at a later period in the cycle of the machine the arm 167 is moved back to its rest position shown in Figs. 6 and 7 so as to be ready to swing the latch 714 clockwise and accordingly again to trip the clutch at the proper time.

The carriage 38 and the loader block 68 are operatively connected by mechanism, which will be presently described, to fluid pressure means 732 (Figs. 6 and 12) which is associated with the fluid pressure means 54, 58 and 704. The fluid pressure means 732 comprises an arm 174 (Figs. 6, 8, 9 and 12) secured to the upper end of a vertical shaft 176 which is journaled in brackets 178 secured to the post 154 and has secured to its lower end a two-part arm 734 an outer portion of which carries a roll 736 registering in a way 737 of a cam 738 secured by a bolt 740 to a bracket portion 152a (Figs. 3 and 9) of the loader block arm 152. It will be noted that the bracket portion 152a of the loader block arm 152 is secured to said arm by screws 152b, 1520, the bolt 740 in combination with interengaging portions of said bracket portion and the cam 738 serving effectively to secure the cam to the bracket portion. The outer portion of the Z-part arm 734 is initially adjusted on an inner portion of said arm by the provision of a bolt and slot connection 734a (Fig. 6).

When the arm 174 is in its position shown in Fig. 8,

themachine being idle, the loader block 68 is arranged over the nailing die 66. and the carriage; 38 is arranged in aposition in which the. heel form, 40 is adapted to receive the composite heel 28 which is to be. attached to the shoe. When the arm 174 has. been swung to-its: position shown in Fig. 9 the heel receiving form, 40 is. arranged over the nailing die 66 andthe loader block 68 is. in its nail receiving position beneath the foot plate 72' of the tubeholder 74. Counterclockwise movement of the loader block arm 152, as viewed from above, is arrested by the engagement of said arm with a. rod 84a which forms part of the main frame 84 of the machine, the cam. 738 at this time being in engagement with a plunger 193 of a microswitch. M-10 and thus insuring, as will be hereinafter explained, that the machine cannot: be started through its cycle unless the heel form 40 is in a predetermined position above the nailing die 66. Clockwise movement of the loader block arm, 152, as viewed from above, is limited by the engagement of a screw 153, which is threaded into the bracket portion 152av of the loader block arm- 152', with the mainv frame 84.

It will be noted that the last 50, which is disclosed in United States Letters Patent No. 1,948,547, granted February 27, 1934, on anapplication filed in the name of Laurence E. Topham, improved as disclosed in said application Serial No. 680,511, comprises a metal positioning plate 270 provided with shoulders 272, 2.74 (Figs. 5' and 10) which are positioned equal distances from a vertical or heightwise median plane 283 of, the heel seat of the last. The positioning plate 270 and the back cone of the last have extending through and into them respectively a thimble 271 for receiving a. spindle or pin 266 of the jack, an axis 273 of the thimble being coincident with the center of curvature of the rear end of the periphery of the heel seat of, the last. Since the positioning plate 270 is secured, to the last it: will be conconsidered part of the last and a top face 280 of said plate shall be considered as, constituting the top face of the back cone of the last. The last 50 and its positioning plate are disclosed in detail and are claimed in United States Letters Patentv No. 2,806,233, granted September 17, 1957, on an application filed in the names of Arthur R. Hubbard et al.

As above explained, when the machine is idlev (Figs. 3 and 8) the loader block 68 is in. its nail delivering or dumping position over the nailing die 66 and the heel form 40 is in a convenientv position for the operator readily to place the rubber heel, 28, which is to be attached to the shoe, in said form. The loader block 68 starts back to its nail receiving position shown in Figs. 4 and 9 simultaneously with the tripping of the clutch 158 by reason of the switch M-11 being closed, as above explained, by the placing of the last 50, upon which the shoe 36 is mounted, on the spindle 266 of the jack 700, the switch K3-A of the relay including the coil K3 being closed to energize simultaneously with the energizing of the solenoid S6, the solenoid S7, which is operatively connected to a transfer valve 742 (Fig. 12). The valve 742 comprises a spool 744 which is slidingly mounted in the bore 746 of a cylinder 748 and is constantly urged by a spring 750 into engagement with a face 752 of the cylinder. When the solenoid S7 is deenergized a line 754 which is in communication with a line 542, identical with the line 542 disclosed in application Serial No. 680,511, is open through ports 756, 758 of the cylinder 748 to a line 760 leading to a chamber 762 formed by a cylinder 764 which is pivotally mounted on the main frame 84 as shown in Fig. 6 and a piston 766 which is movable in said cylinder and is secured to a rod 768 pivotally connected to the arm 174. Another chamber 770 formed by the cylinder 764 and the piston 766 is open to a line 772 connected at this time through ports 774, 778 of the valve 742 to an exhaust line 77 6.

When the spool 744 is in engagement with the face 752 of the valve 742 fluid under pressure in the line 542 is available for the chamber 762 and the chamber 770 is open to exhaust with the result that the heel form 40 and the loader block 68 are in their positions shown in Figs. 3 and 8, clockwise movement, as viewed from above, of the loader block arm 152 being limited by the engagement of the screw 153, which is adjustably mounted on the bracket portion 15211 of said arm, with the main frame 84. When the switch M11 is closed the solenoid S7 is energized, as above explained, causing the spool 744 to be moved into engagement with a face 780 of the valve 742 and thus to open the pressure line 754 and an exhaust line 782 to the lines 772, 760 respectively with the result that the piston 766, through the mechanism above described, swings the heel form 40 and the loader block 68 from their positions shown in Fig. 8 to their positions shown in Fig. 9, the heel form being arranged over the nailing die 66 and the loader block being positioned beneath .the foot plate 72 of the tube holder 74.

When the solenoid S6 is energized in response to the closing of the switch M-11 the one-revolution clutch 158 is tripped and accordingly the nail distributor dumps 'a load of nails into the upper and lower machine tubes 76, 78, the construction and arrangement being such that the loader block 68 arrives beneath the foot plate 72 of the tube holder 74 before the nails reach the lower ends of the tubes '78, said nails being delivered through the passages 73 of the foot plate to the loader block then in a waiting position beneath said foot plate.

The jack 700 is secured to a supporting plate or slide 192 (Figs. 1, 2, and 12) which is slidingly mounted along a guideway 194 of a guide beam 196 secured by screws 198 to the lower end of a plunger 200 vertically movable along a guideway 202 in an overhanging bracket 204 bolted to and forming in effect part of the main frame 84. The guide beam 196 together with its associated mechanism for moving the work between the loading and unloading station 46 and the heel attaching station 52 may be referred to as a transfer unit of the machine and the guide beam may be described as having a guideway 194 extending between said stations.

Pivotally connected to a lug 208 secured to the guide beam 196 is a cylinder 210 in a chamber 218 of which is slidingly mounted a piston 212 having secured to it a connecting rod 213 the forward end of which passes through a bore in an angle bar 783 secured by screws 785 to the supporting plate 192 of the jack 780. The connecting rod 213 is adjustably secured to the slide 192 and accordingly to the jack 700 by a pair of nuts 215 threaded onto the connecting rod and adapted to bear against the angle bar 783 which is secured to the supporting plate 192. Forward movement of the jack 700 is limited by the engagement of a front face 484 of the piston 212 with a front end of the cylinder 210, the forward or loading and unloading position of the jack being varied forward or rearward with relation to the piston rod 213 by the use of the nuts 215. When the machine is idle but powered a plunger 392 of a transfer valve 394 is held in its central or neutral position shown in Fig. 12, oil in lines 482, 486 which are open respectively to the front face 484 and a rear face 220 of the piston 212 being sealed by said plunger, and accordingly the jack 700 being held against movement. As will be hereinafter explained, just before the jack 700 arrives at the loading and unloading station 46 a plunger 784 of a microswitch M-12 adjustably secured on the guide beam 196 is forced across contacts of this switch causing a solenoid S8 to be energized whereby to cause through mechanism which will now be described, the ejector 702 to force, if necessary, the work from the jack 700.

The solenoid S8 is operatively connected to a spool 786 (Fig. 12) which comprises part of an ejector valve 788 and is mounted for sliding movement in a bore 790 of this valve. The spool 786 is normally held by a spring 792 against a face 794 of the valve 788 which comprises a pair of exhaust ports 796, 796a and a pressure intake port 798 which is connected to the line 542. The ejector valve 788 also has a pair of ports 800, 802 open respectively to lines 804, 806 which are connected to chamber 808, 810 formed by a cylinder 812 secured to the jack 700 and a piston 814 which is slidable in a bore of the cylinder and has connected to it the ejector 702 which, as above explained, is adapted to be forced against the top face 280 of the back cone of the last 50 whereby to push the last off the spindle 266 of the jack in case the thimble 271 of the last tends to bind upon said spindle.

, The plunger 786 of the ejector valve 788 is normally forced against the face 794 of this valve by the spring 792 causing oil under pressure regulated by a relief valve 590 to be available for the line 806 and accordingly for the chamber 810 whereby to maintain the piston in forced engagement with the upper end of said chamber and thus maintaining the ejector 702 in a raised position slightly above an abutment or abutment face 816 of the jack 7 00. When as the jack 700 arrives at the loading and unloading station 46 the solenoid S8 is energized in response to the closing of the switch M-12, the spool 786 of the valve 788 is moved against a face 818 of this valve causing oil under pressure from the line 542 to be available for the line 804 and the exhaust port 796a to be open to the line 806 with the result that the ejector 702 is depressed to move the work from the jack 700. It will be noted that as the last 50 is removed from the jack 700 the switch M-11 is opened and the coil K3 of the relay, which includes the switches K3-A and K3-B, is deenergized with the result that these switches open and the solenoid S8 is deenergized causing the spool 786 to return in the ejector valve 788 to its rest position shown in Fig. 12 and the ejector 702 to move to its raised or retracted position. it will also be noted that the opening of the switches KS-A and K3B causes other circuits hereinafter referred to be reset.

The jack 700 has pivotally mounted on bearing pins 820 (Figs. 1, 2, 5 and 10) secured to it a pair of levers 822 which are adapted to engage the outer and inner faces 274, 272 of the positioning plate 270 of the last 50 to orient said last on the spindle 266 of the jack with the heightwise median plane 283 of the heel seat of the last arranged in a fixed plane extending forward and rearward of the machine irrespective of whether the last is a right or a left. It will be noted at this point that although the heightwise median plane 283 of the heel seats of right and left shoes is in a fixed plane when the shoes are presented to the machine, said right and left shoes as an entirety, because of the swing" of the last, are arranged in different positions such as shown in Fig. 2 of said Patent 2,806,233. The bell crank levers 822 are provided with follower portions 822:: which fit in a circular groove or channel 824 formed in a boss portion of a rod 826 mounted for vertical sliding movement in a bore 828 of the jack, the construction and arrangement being such that when the rod is raised, by mechanism hereinafter described, abutment faces 822b of the levers 822 are swung equal distances in opposite directions towards the last 50 which has been mounted on the spindle 266 of the jack 700 and toward the top face 288 of the back cone of which is in engagement with the abutment face 816 of the jack. When the last 50 is mounted on the jack 700 with its thimble 271 encircling the last spindle 266 and its top face 280 in engagement with the abutment face 816 of the jack, the abutment faces 822b of the bell crank levers 822 are moved equal distances toward each other into engagement with the shoulders 272, 274 of the positioning plate 270 of the last 50 whereby to swing the heightwise median plane 283 of the heel seat of the last into a position in which his coincident with the heightwise median plane of the guideway 194 and of the heel form 40 in its position shown in Fig. 9. It will be noted that during the time that the jack 700 and accordingly the work on. itrare being. transferred to and from the heel attaching station 52 and. during movement of the jack in the heel attaching station the heightwise median plane of: the heel seat of the shoe remains coincident with. the fixed heightwise median plane of. the guideway 194.

In order to secure the last 58 to the jack 700 while the. work on said last is being presented to the machine to. attach. the heel 28 to the shoe 36', there is mounted on a. bearing pin 829, which is secured to the jack, a latch 83.0. having a follower portion 830a adapted. to engage. in the circular groove 824 of the rod 826.. When the rod 826 is raised in the bore 828 of the jack 700 to centralize or orient the work on said jack, as above described, the latch 838 is moved clockwise as viewed in Figs. 2v and with the result that a V-shaped lower end of. thelatch engages a V=shaped slot 834 formed in the rear end of. the positioning plate 270- of the last 50 upon: which the shoe 36 is mounted.

The. rod 826 has a threaded reduced. shank. portion 826a (Figs.v l and 5') which passes through a recess of a cupsshaped sleeve 836 andis threaded into a spring holder 838.v Pivotal-1y mounted upon. a bearing, rod 839 secured to the supporting plate. or slide 192 is a lever 840 one armof which is pivotally connected tor a thimble 842 compn'sing a threaded shank 842a=which passes through a bore in a cup-shaped sleeve 844' slidingly engaging the sleeve. 836 and is threaded into a spring holder 846. Opposite ends of av spring: 848 are anchored to the holders 838, 846,. said spring normally serving to cause said holders to be urged into contact with. each other, the unit formed by the holders and the sleeves 836, 844 serving as a yielding connection between the lever 840 and the. rod 826.

The lever 840 is constantly biased counterclockwise, as viewed in Figs. 2 and 5, upon the support 192 by a spring 849 and has rotatably mounted on. it a cam roll 850. which, is constantly in engagement with a face 851. of, a cam 852 secured to the guide beam 196.. The face 851 of the cam 852 comprises. a retracted portion 851a. with. which the roll 850 of. the lever 848 engages when. the machine is atv rest as shown. in Fig. 5 and a salient portion 8511) which is engaged by said oam roll as soon as the jack 700 starts rearward from the loading and unloading station 46. When the machine is at rest, the cam roll 850 being in engagement with the retracted portion 851a of. the earn. 852, the levers 822 are in positions in which their faces 8225 are spaced substantial distancesfrom the surfaces 272, 274 of the positioning plate 278 of the last positioned upon the spindle 266 and the latch 838 is in a. position in which its V-shaped portion is spaced rearward of the /-shaped slot 834 of the plate of said last.

As above explained, when the machine is. idle, the jack 788 being. in its loading and unloading station 45, the ejector 702 is in a raised position above the abut ment face 816 of the jack and is held there by fluid pressure available for the chamber 810 as illustrated in Fig. 12. Slidable in a bore 854 (Fig; 5) in the rod 826 and normally extending below the abutment face 816 of the jack 7% is a plunger 856 the upper end of which bears against the under face of a lever 858 which is included in slots formed in a post portion of' the jack and in' the rod 826 and which is j'ournaled on a bearing pin 860' secured to said post portion and is biased clockwise about said pin by a spring 861, downward movement of the plunger in said rod being limited by the engagement of a collar 852' secured to the plunger with aface 864 of the jack. When the plunger 856' is ina loweredposition a laterally bent portion of the lever 858 is arranged above and adjacent to a plunger 866 of the normally open switch M-II. As above: explained, when: the: work is mounted on the jack 7-8.8 in its posishown in Fig; 2,, the switch M-11 is closed with the result that the coil K3 of the relay including noriQ molly open: switches Ki-A and K3-B is energized to close these switches. Theclosing of the switchv KS-A causes, through a line including the normally closed switch: K2-A of a. relay including a coil K2, solenoids S3,, S6 and S7 to be energized. The energizing oh the solenoid S3 causes the spool 392 of the transfer. valve 394 to. be moved against a face 479 of. this valve with the result that oilunder high pressure is available for the face 484 of: the piston 212 the oil at the other sideof the piston exhausting through the pipe 486 and accordingly the. jack 700' moves rearward from its load ing and. unloading station 46 to its heel attaching station 52- as: disclosed. in. detail: in said application Serial No. 680511. As heretofore explained, the energizing of the solenoid S7 causes the spool 744-01 the nail transfer valve: 742 to be displaced against the action of the spring 750 to a position against the face 780 of. this value with. the result. that high and low pressure oil in the lines 772,, 760 respectively causes, through. the. mechanism above described, the loader block 68 and the form 40 in which the heelhas been positioned (Fig. 3) to be moved from their positions shown in Fig. 8 to their positions shownin Fig.v 9 in which the loader block 68 positioned beneath. the foot plate 72 of the tube holder 74 and in which the form is arranged. over the nailing die 66. The energizing of. the solenoid S6 causes,v through the mechanism above described, the onerevolution clutch. 158' to be tripped and accordingly nails. to be dropped: through the upper and lower tubes Z6, Z8 tov passages of the foot plate 72 and thus to the passages: 70 of. the loader block 68 which arrives below said foot plate before the nails reach. the lower ends:- of the tubes 78.

As the supporting plate or slide portion 192 of the jack. 700 moves. rearward. along the guideway 1-94 oi the guide beam 196', the: cam 11011850 of. the lever 840- moves onto the salient. portion. 8515 of the face 851. of the earn. 852 causing. through the above described; mechanism, the abutment faces 822b of. the centralizing. levers 822 to swing: into engagement with the faces 272, 27:4 of the positioning. platev 270 of. the last 50 upon which theshoe 36 is mounted. and. also causing the V-shaped lower end of thev latch. 830 to engage the V-shaped slot 834 at the: rear end. of. the positioning plate, said. levers serving to centralize the heel. seat portion of. the shoe in the machine its heightwise median plane 283 coincident with. the vertical median plane of the heel holder 4.0: in its position shown in Fig 9 above the nailing: die 68 and. the latch 83:9 serving to secure. the last: against: movement on the spindle 266 of. the jack. As heretofore explained, as: the loader block 68' arrives at: its nail receiving position below the foot plate 72 of the tube holder'74 the earn. 738, which constitutes part of the loader block transfer mechanism, moves the plunger 193 of the normally open switch M.10 across the terminals of this switch just before the loader block arm- 152 engages therod 84a of the main frame 84. The switch M-1l0. constitutes part. of safety mechanism for insuring against operatinga control valve 524 hereinafter referred to, until the heel form 40 has been moved to its proper operating position. over the nailing: die 68.

During rearward movement of the jack 700' andthe shoe 36 carried by it, the rear end' ofth'e shoe engages an abutment plate 452 of a back gage causing it. to move rearwardl-v and thus to displace a plunger 474 of; a. nonmall y open rnicroswit'ch M-6 across terminals of this switch just as a slide plate 456, upon which the gage'plat'e 452 is adjustabl y mounted, strikes a fixed stop screw 468. The closing of the switch M-6 effects, through a normally closed switch Kl-B which forms part of a relay including a coil K1, the: energizing of a solenoid S5 operati vel y connected to the control". valve 524w thereby causing a spool 5-34 of this valveto be moved: into engagement with: the end face 5690f. thevalve. When this occurs oil from; a high pressure line 528 passes through the valve 524 into a 1 1 branch or holddown line 568 leading to a chamber 562 formed by a cylinder 504 and a piston 500, a chamber 502 formed by said cylinder and said piston at this time being open to an exhaust line 581 with the result that the guide beam 196, which is operatively connected to the piston 500 by the plunger 200, a lever 494 and a connecting rod 498, is lowered thereby to force with preliminary pressure the heel seat of the shoe 36 mounted on the last 50 against the heel 28 in the form 40.

When the heel seat of the shoe 36 has been forced with preliminary pressure against the heel 28 in the form 40 positioned over the nailing die 66, pressure in the line 568 is suflicient to cause a spool 576 of a sequence valve 570 to be raised in a bore 578 of this valve a sufficient distance to allow oil under pressure to be available for equalizing or transfer lines 572a, 572 and accordingly for faces 610, 608 of the driver and the clamping pistons or actuators 112, 500 respectively. The pressure at which the sequence valve 570 transfers oil from the holddown line 568 to the equalizing or transfer lines 572, 572a may be varied by initial adjustment of a spring 582 of this valve, the pressure being just lower than the pressure at which the relief valve 530 is set to spill oil. It will be noted that the areas of the faces 608, 610 of the clamping and driving pistons 500, 112 respectively are substantially equal and that the pressures exerted against these faces by oil are approximately the same. As driving pressure builds up in a pressure chamber 574, which is for-med by the driving piston 112 and the cylinder 116, as the nail drivers 60 meet considerable resistance, this pressure is simultaneously operative against the face 608 of the clamping piston 500 causing the heel seat of the shoe 36 to be forced against the heel 28 with secondary pressure which is additional to the preliminary force or pressure of about 1000 lbs.

Pressure exerted against the face 610 of the driving piston 112 causes the driver 60 to force the nails 62 then in the passages 64 of the nailing die 66 into the heel 28 and the heel seat of the shoe 36 and to clench them against the heel plate 51 (Fig. 11) of the last 50. It will be apparent that the downward pressure of the shoe 36 against the heel 28 is always greater than the upward pressure exerted against the nails 62 in driving them into the work by an amount equal to the force (approximately 1000 lbs.) exerted against a face 606 of the piston 500.

Threaded into a lug 612 (Fig. 12) secured to the piston 112 is a frusto conical striker 614 which, when the nails 62 have been driven to the proper depth into the work, engages a plunger 616 of a normally open microswitch M7 causing said plunger to bridge terminals of this microswitch and thereby energizing the above-mentioned relay coil K1 which is maintained energized, after the plunger of the microswitch M7 has been released, by the closing of a normally open switch Kl-A which is in a holding line and forms part of the relay embodying the coil K1. The energizing of the relay coil K1 also ehects the opening of the normally closed switch Kl-B of the relay embodying the coil K1 and accordingly the deenergizing of the solenoid S with the result that the spool 534 of the control valve 524 is moved by a spring 535 to its rest position shown in Fig. 12 against a face 533 of this valve. Oil from the high pressure line 528 is now available for a line 538 leading to the upper chamber 502 of the cylinder 504 .and for the line 542 leading to an upper chamber 540 of the cylinder 116 with the result that the pistons 500, 112 in these cylinders respectively are moved to their lowered positions into engagement with faces 597, 599 of the cylfrom a plunger 607 of a switch M8 thereby allowing said switch to open by spring action and to remain open until this piston returns to its lowered position. Accordingly, it will be noted that while the jack 700 is being lowered and is held in its lowered position at the heel attaching station 52 and is being raised at this station preparatory to being returned to the loading and unloading station 46, the switch M8 is open. As the clamping piston 500 returns to its lowered starting position shown in Fig. 12 and accordingly the guide beam 196 is moved to its raised position at the heel attaching station 52, the cam 605 carried by the connecting rod 498 forces the plunger 607 of the switch M8 across terminals of this switch whereby to energize a solenoid S4 and the coil K2 of the relay embodying the switch K2-A. The energizing of the coil K2 causes the switch K2-A of the relay including this coil to be opened with the result that the solenoids S3, S6 and S7 are deenergized. The deenergizing and energizing of the solenoids S3 and S4 respectively causes the spool 392 of the transfer valve 394 to be moved against a face 397 of this valve thereby rendering oil under pressure in the line 542 available for the line 486 and accordingly for the face 220 of the piston 212 and opening the face 484 of said piston to exhaust pressure with the result that the jack 700 is moved from the heel attaching station 52 to the loading and unloading station 46, forward movement of the jack being limited by engagement of the face 484 of the piston with the forward end of the cylinder 210.

When the solenoid S6 is deenergized the bell crank lever 166 is moved counterclockwise by the action of the spring 165 causing the arm 167 and the block 722 mounted on it to return to its rest position shown in Figs. 6 and 7 ready to trip the clutch 158 of the nail distributor at the beginning of the next cycle. When the solenoid S7 is deenergized the spool 744 of the nail transfer valve 742 is moved into engagement with the face 752 of this valve by the spring 750 causing oil under pressure in the line 754 to be available for the chamber 762 in the cylinder 764 and oil in the chamber 770 to be open to the exhaust line 776 with the result that the loader block 68 and the heel form 40 operated by the mechanism above described are swung from their the block, is released to enable the nails in the passages 70 of said block to be delivered to the nailing die. The loader block 68 and the shutter control mechanism thereof are disclosed in detail in United States Letters Patent No. ,274,777, granted March 3, 1942, on an application filed in the name of William S. Dallas.

Just before the jack 700 arrives at the loading and unloading station 46 the roll 850 of the lever 840 runs onto the retracted portion 851a of the cam face 851 causing through the above described mechanism the abutment faces 82% of the levers 822 to swing away from each other and away from the positioning plate 270 of the last 50 and to cause the latch 830 to swing away from the V-shaped slot 834 of said plate, said last, unless it binds on the last spindle 266, usually falling from said pin and onto the cloth tray 706 ready to be removed from the machine.

As the jack 700 arrives at the loading and unloading station 46 it operates the plunger 784 of the switch M-12 causing the terminals of this switch to be bridged and accordingly the solenoid S8 to be energized. When this occurs the plunger 786 of the ejector valve 788 is moved against the action of the spring 792 into engagement with the face 818 of this valve with the result that high pressure oil from the line 542 is available for the chamber 808 of the cylinder 812 and the chamber 810 of this cylinder is open to the exhaust port 796a. When this occurs the ejector 702 is fully depressed and acting against the top face 280 of the positioning plate 220 of the last 50, ejects the last and the shoe mounted on it from the spindle 266 of the jack 700 if it. has notv previously fallen from it. By providing the ejector 702 the shoe 36 to which the heel '28 has been attached will always be removed from the jack 700. as it arrives at the loading and unloading station 46 so that. the operator may immediately place the next shoe to be operated on upon the jack.

As the work is removed from. the jack 70.0 the normally open switch M11 is opened causing the coil K3 to be deenergized: and accordingly opening the switches K3A and. K3-B' of a relay including this coil. Accordingly, the solenoid. S8 is immediately deenergized and accordingly the plunger 786 of. the ejector valve 788 is moved back. to its retracted position shown inv Fig. 12. It will. also be notedthat the openingof the switch K'3-B causes the solenoid S4 to be deenergized with the result: that the spool 392 of: the transfer valve 397' is moved under the action. of its associated springs back to its central position in which the lines 482,. 486 are sealed to hold the jack in its loading and unloading position 46.

Having thus described. my' invention, what I claim as new' and desire to secure by Letters Patent of the United States is:

1. In a machine for operating upon shoes, a jack, means for orienting a last, which bears a shoe, upon the jack, means for operating said orienting means, and power means responsive to the placing of the last upon the jack for effectingoperation of said operating means to cause said orienting means to orient the last upon the jack.

2. In a machine for operating upon shoes, a jack, means for orienting a last, which bears a shoe, upon the jack, means for securing the last to the jack, means for operating said orienting means and said securing means, and power means responsive to the placing of the last'upon the jack. for effecting operation of said operating means to cause said orienting means. to orient the last upon the jack and to cause. said securing means to secure the last to said jack.

3. In a machine. for operating upon shoes, a jackhaving an abutment face and a spindle which projects be.- yond'said face and is adapted to receive a. last having a shoe mounted on it, means for orienting said last upon the spindle of the jack, means for securing the last upon said spindle, means for operating said orienting; means and said securing means, and power means, which comprises a sensing member. projecting beyond said face and is responsive to the placing of a last upon said spindle, for causing operation. of said operating means to render said. orienting means active to orient the last upon the spindle. of. the jack and. to render said. securing means active to secure the lasttothe said; spindle.

4. In a machine foroperating upon shoes, a, jjack'having an abutment face and a spindle which projects beyond said face and is adapted. to. receive a last which has a shoe mounted on it and which has a, pair of orienting faces equally spaced from a heightwise median plane of a heel seat oft-he last, members mounted on said jack for equal movement in opposite directions, means for operating said members, and power means which comprises a plunger rendered active in response to the mounting of the last upon the spindle for effecting operation of said operating means to cause said members to be forced into engagement with said orienting faces respectively of the last on the spindle to position said last and accordingly the shoe circumferentially on said spindle.

5. In a heel attaching machine, a jack for receiving a last which is provided with abutment faces, power means for moving the last between a loading and unloading station, in which the last bearing a shoe is mounted upon and removed from the jack, and a heel attaching station where a heel is attached to the shoe, and power operated mechanism which is mounted on the jack and is operative in timed relation with said power means and of the last for orienting the last on. and securing it, to the jack.

6. In a heel attaching machine, a jack. for receiving a last which. is provided with abutment. faces, fluid pressure means for moving the jackbetween a loading andunloading station, in which the last bearing. ashoe is mounted upon and removed from the jack, anda. heel attaching station where a. heel is attached. to the shoe, and fluid pressure operated means which is. operative in timed relation. with said fluid pressure means. and which is adapted to beforced against the. abutment faces. of the last. for orienting said lastv on and securing it to the jack, means for causing said fluidpressureoperated means to he moved away from said faces of the last. just before the last arrives at the loading and unloading station. whereby to release the last and. thus to allow it. to be removed from the jack, and. an. ejector for positively forcing the last. from the spindle of the jack. after the last. has been released from the jack.

7. In a heel attaching machine, a jack. for receiving a last provided with abutment faceswhich are spaced equal distances from a heightwise median plane of a heel seat of the last, means comprising power operated mechanism for moving the jack in a predetermined path between a loading. and unloading station, where the last bearing a shoe is. mounted upon and removed from the jack, and a heel attaching stationwhere a heel is. attached to the. shoe, mechanism which is mounted on the jack and' is responsive to the operation of. said means and to movement of the jack out of' the loading and unloading station and is. adapted tocooperate with said abutment faces. of the jack to position the last. upon said jack and to secure the last to the jack,, means responsive to the placing of the last. onthe jack. for rendering said power means active, and means for rendering saidmechanism inactive as the jack arrives at the. loading and unloading station whereby to cause said mechanism to be moved away from the abutment. faces of the jack as, it arrives at this station to release the last from the jack.

8. In a machine. for attaching heels to shoes, a. jack movable between a. loading. and. unloading station and a heel, attaching station, means. operative in response to the placing of a last upon the jack at the loading and unloading station for moving the jack from the loading and unloading station tow the heel attaching station, means responsive to theioperation of the first-named. means. for orienting the last upon the jack with a heightwise median plane of the last arranged in a fixed plane and also for retaining the positioned last upon the jack, means for moving the jack from the heel attaching station to the loading and unloading station, and means responsive to movement of the jack to the loading and unloading station for rendering said second-named means inactive whereby to. allow' the last to fall from the jack;

9. In a machine. for operating upon shoes, a jack'movable between. a loading and unloadingstation and an operating station, said; jack; comprising a spindle adapted to receive a thimble extendingthrough a positioning plate, which is secured to the upper face of a back cone of. a last, andinto said back cone, a. pair of levers whichare mounted upon the jack for movement toward and away from each other and are adapted to cooperate with the positioning plate of the last in the orienting of right and left lasts upon the spindle to positions in which a heightwise median plane of the heel seat of the last lies in a fixed plane of the machine, a latch mounted for movement on the jack and adapted to cooperate with the positioning plate to secure the last against movement on the jack spindle, power means for moving the jack between the loading and unloading station and the operating station, and mechanism operated in timed relation with said power means for operating the levers and the latch.

10. In a machine for operating upon shoes, a jack which is movable between a loading and unloading station and an operating station and which has a spindle adapted to receive a thimble of a geometrically graded last provided with a positioning plate having faces which are positioned equidistant from a heightwise median plane of the heel seat of the last, a pair of levers which are mounted on the jack for equal movement toward and away from each other and are adapted to engage said faces of the positioning plate whereby to orient upon the spindle the heightwise median planes of the heel seats of right and left lasts and accordingly shoes mounted on said lasts to positions in which they are coincident with a fixed plane of the machine, a latch mounted for movement on the jack and adapted to cooperate with the positioning plate of the last in the securing of the last upon the jack, a switch responsive to the mounting of the last upon the spindle of the jack, and means responsive to the operation of said switch for moving the jack and the work on it from the loading and unloading station to the operating station, and means responsive to the operation of said last-named means for operating the levers and the latch.

11. in a machine for operating upon shoes, a jack movable between a loading and unloading station and an operating station, power operated means for positioning and retaining a last and accordingly a shoe mounted on said last upon said jack, power operated means rendered active in response to the placing of the last upon the jack for moving the jack from the loading and unloading station to the operating station, and means movable in response to movement of the jack away from the loading and unloading station for rendering said first-named power operated means active.

12. In a machine for operating upon shoes, a jack having a spindle, said jack being movable between a loading and unloading station and an operating station, power operated means for positioning and retaining a last, which has a thimble and has a shoe mounted on it, upon said jack, fluid pressure means, means rendered active in response to the mounting of the last upon the spindle for causing said fluid pressure means to move the jack from the loading and unloading station to the operating station, and mechanism rendered active in response to movement of the jack toward the operating station for positively orienting the last upon the spindle and retaining it on said spindle in its oriented position.

13. In a heel attaching machine, means arranged at a heel attaching station for receiving a heel, a jack for receiving a last having a shoe mounted on it, means for automatically moving the jack and accordingly the shoe mounted on said jack between a loading and unloading station, which is spaced a substantial distance from the heel attaching station, and said heel attaching station, means responsive to the placing of the last upon the jack ,at the loading and unloading station for initiating operatio'n of the second-named means, means responsive to the operation of said second-named means for positioning the last upon and securing it against movement to the jack, power means responsive to movement of the shoe to the heel attaching station for moving in the heel attaching station the shoe toward the heel whereby to force a heel seat of the shoe against said heel, and means for -16 inserting fastenings into the heel and the heel seat of the shoe to attach the heel to the shoe.

14. In a heel attaching machine, a nailing die arranged at a heel attaching station, a form which is adapted to receive a heel and is movable between a heel receiving position and an operating position over said die, a jack adapted to receive a last bearing a sho'e, fluid pressure means for moving the jack between a loading and unloading station, which is spaced a substantial distance from the heel attaching station, and said heel attaching station, fluid pressure means responsive to movement of the shoe to the heel attaching station for moving at said heel attaching station the shoe toward the nailing die whereby to force a heel seat of the shoe against the heel supported upon the form in its operating position, fluid pressure means for inserting nails into the heel and the heel seat of the shoe to attach the heel to the shoe, a nail distributor, a foot plate for receiving nails from the distributor, a loader block operatively connected to the form and movable between a nail receiving position beneath the foot plate and a nail dumping position above the nailing die, and fluid pressure means movable in response to initial movement of the jack away from the heel attaching station for moving said loader block to its nail dumping position over the nailing die and for moving the form to said heel receiving position, said fluid pressure means being movable in response to initial movement of the jack away from the loading and unloading position for moving the loader block to its nail receiving position beneath the foot plate and the form to its operating position over the nailing die and also for operating the nail distributor to cause nails to be delivered to said foot plate and to the loader block.

15. In a heel attaching machine operating through a fixed cycle, a nailing die, a foot plate, a nail distributor for delivering nails to the foot plate, a form adapted to receive a heel and movable between an active position over the nailing die and a heel receiving position at one side of said die, a loader block which is operatively connected to the form and is movable between the foot plate where it receives nails and a position above the nailing die where it delivers nails to the die, fluid pressure means which are adapted at the end of each cycle of operation of the machine to move the loader block from the foot plate to the nailing die and to cause it to come to rest over said die and which are adapted simultaneously to move the heel form from the nailing die to a position at one side of the die and to cause it to come to rest in this positio'n, and means for rendering said fluid pressure means active in response to the beginning of a following cycle of the machine for returning the loader block to the foot plate and for returning the heel form to its position over the nailing die and also for operating the nail distributor whereby to deliver nails to the loader block after said block has arrived at the foot plate.

References Cited in the file of this patent UNITED STATES PATENTS 596,305 Pettengill Dec. 28, 1897 674,806 Woods May 21, 1901 687,362 Winkley Nov. 26, 1901 2,579,936 Lancaster Dec. 25, 1951 

